Mikrobinen proteiinin ilmentämisjärjestelmä

• Main Authors: ZAVIALOV,ANTON VLADIMIROVICH, KORPELA,TIMO KALEVI, KOROBKO,VYACHESLAV GRIGORIEVICH, PETROVSKAYA,LADA EVGENIEVNA, BATTCHIKOVA,NATALIA VSEVOLODOVNA, ZAV'YALOV,VLADIMIR PETROVICH, MACINTYRE-AYANE,SHEILA
• Format: Patent
• Language: Finnish; Swedish
• Published: 15.07.2002
• Edition: 7
• Subjects: BEER; BIOCHEMISTRY; CHEMISTRY; COMPOSITIONS THEREOF; CULTURE MEDIA; ENZYMOLOGY; FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE; METALLURGY; MICROBIOLOGY; MICROORGANISMS OR ENZYMES; MUTATION OR GENETIC ENGINEERING; PROPAGATING, PRESERVING OR MAINTAINING MICROORGANISMS; SPIRITS; VINEGAR; WINE

The present invention provides bacterial strains for secretion of soluble biologically active recombinant heterologous proteins into periplasm or on a surface/into a cultivation medium of bacteria. The invention exploits the secretion system of Gram-negative bacteria including periplasmic chaperones and usher/secretin proteins. For accomplishing the aim, the bacterial strains simultaneously express the fusion protein (signal peptide)-(mature hecterologous protein)-(subunit of a bacterial surface structure, Caf1), periplasmic chaperone specific for the subunit, and outer membrane usher/secretin protein specific for the subunit. Secretion of fusion proteins: (signal peptide of Caf1)-(mature human IL-1beta)-(mature Caf1), (signal peptide of Caf1)-(mature human GM-CSF)-(mature Caf1), and (signal peptide of Caf1)-(mature human IL-1ra)-(mature Caf1) that were expressed in Escherichia coli simultaneously with the periplasmic chaperone Caf1M and the usher/secretin protein Caf1A are examples of the use of the invention.